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https://ja.hideki.hclippr.com/2008/11/24/aprs%e3%82%a4%e3%83%99%e3%83%b3%e3%83%88%e3%80%8chalfway-across-the-country-with-aprs%e3%80%8d%e3%81%ab%e3%81%a4%e3%81%84%e3%81%a6/
APRSイベント「Halfway Across the Country with APRS」について